Squashed 'core/' changes from db0321d..3771edd

3771edd Fix semantic versioning
cf60fa8 Merge branch 'feature/noplugins' into develop
5f53dd1 Fix tests
98f5614 Remove FTP dependency in test
c595118 Removing default plugins FTP and WebDAV (first attempt)
6960571 Fixing Travis CI test issues
fbe2ab2 Merge branch 'feature/easyplugin' into develop, closes #26
20bf055 Defaults for plugin options
66db8c9 Plugin tests
e54b8a4 Error messages on wrong local file
6e73eb3 Help texts
1802bfb Formatting
08695be Adjusted plugins API; client side; nicer table output
7821364 Merge branch 'develop' of github.com:binwiederhier/syncany into develop
21dc600 Update README.md

git-subtree-dir: core
git-subtree-split: 3771edd53468396d4e9a22cc7dfe7608a5b14984
Merge commit 'bfd1734ee515720e330d064facfa5178d16178eb' into develop